* {
    margin: 0;
    padding: 0;
}
.main {
    width: 100%;
    background: url(../img/world_map.png) center center no-repeat;
    background-color: #f5f5f5;
    padding-bottom: 40px;
}
.main-txt {
    padding-top: 100px;
    text-align: center;
}
.main-txt .text-top {
    padding-bottom: 20px;
}
.big {
    font-size: 40px;
    font-weight: 700;
}
.small {
    font-size: 24px;
}
.small2 {
    font-weight: 400;
    font-size: 24px;
}
.text-center {
    padding-bottom: 100px;
}
.main img {
    width: 30px;
}
.main-img {
    width: 80%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
}
.top-img1,
.top-img2,
.top-img3 {
    display: flex;
    justify-content: space-between;
}
.pic img {
    width: 100%;
}